all: update readme

Author: abarisain

README.md

@@ -2,22 +2,32 @@
 
 This repository contains Batch's iOS Extension SDK.
 
-It is a light version that only uses Extension-safe APIs. It provides Rich Push capabilities and other functionality.
+It is a light version that only uses Extension-safe APIs for extension-specific features.
 
-The project is written in Swift 5, but Objective-C projects are supported.
-If you do not have Swift code in your app and do not want to bundle the Swift runtime on versions lower than iOS 12.2,
-use Batch-iOS-SDK-Extension-ObjC.
+The project is written in Swift, but can be used with Objective-C.
 
 ## Requirements
 
 - iOS 10 and higher
-- Xcode 11 and higher
+- A Xcode version that supports Swift 5 and higher
+
+## Integration
+
+This extension should be added to your Notification Service Extension. If you don't have one, please see [our documentation](https://doc.batch.com/ios/sdk-integration/rich-notifications-setup).
+
+You will also need to configure an app group shared by your extension and app. See our [tutorial here](https://doc.batch.com/ios/advanced/app-groups).
 
 ### Cocoapods
 
+pod 'BatchExtension'
+
 ### Carthage
 
+github "BatchLabs/Batch-iOS-SDK-Extension"
+
 ### Swift Package Manager
 
-Add `https://github.com/BatchLabs/Batch-iOS-SDK-Extension.git` as a dependency, and add it to your Extension target.
+_Requires Xcode 11_
+
+Add https://github.com/BatchLabs/Batch-iOS-SDK-Extension.git as a dependency, and add it to your Extension target.
 You do not need to add this package to your main target.